100% free online tool

Percentage Calculator

100% free percentage calculator — find percentages, increase or decrease, and what percent one value is of another. No signup.

What is X% of Y?

Result: 30

X is what % of Y?

Result: 20%

Percentage increase / decrease

Result: 25% increase

Formulas used

  • X% of Y = (X ÷ 100) × Y
  • X is what % of Y = (X ÷ Y) × 100
  • Change = ((To − From) ÷ From) × 100

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